rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER

When assigning a NULL value to an RCU protected pointer, no barrier
is needed. The rcu_assign_pointer, used to handle that but will soon
change to not handle the special case.

Convert all rcu_assign_pointer of NULL value.

//smpl
@@ expression P; @@

- rcu_assign_pointer(P, NULL)
+ RCU_INIT_POINTER(P, NULL)

// </smpl>

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index fd1aaf2a4a6c..9b5bd8cafc20 100644
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -69,7 +69,7 @@ void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
         if (!tid_rx)
                 return;
 
-        rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], NULL);
+        RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL);
 
 #ifdef CONFIG_MAC80211_HT_DEBUG
         printk(KERN_DEBUG "Rx BA session stop requested for %pM tid %u\n",
@@ -340,7 +340,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
         status = WLAN_STATUS_SUCCESS;
 
         /* activate it for RX */
-        rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx);
+        RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx);
 
         if (timeout)
                 mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout));